Chapter 7 Plate Tectonics
Across
- 3. Rising mantle material at mid-ocean ridges creates the potential for plates to move away from the ridge with a force.
- 4. the magnetic field reverses direction
- 5. the denser the plate sinks below the more buoyant plate in a process.
- 8. as a slab sinks it pulls on the rest f the plate with a force.
- 11. Earth's surface is made out of rigid slabs of rock, or plates, that move with respect to eachother.
- 13. suggested that continents are in constant motion.
- 14. The cold rigid outermost rock layer.
- 15. all the continents were once part of a supercontinent.
- 16. forms where two places separate.
Down
- 1. Mountain ranges in the middle of the ocean.
- 2. forms where two plates slide past each other.
- 6. A state in which magnetized objects such as a compass needle will orientate themselves to point north.
- 7. the circulation of material caused by differences in temperature and density.
- 9. forms where two plates collide.
- 10. a state in which magnetized objects would reverse direction and orientate themselves to point south.
- 12. Process by which new oceanic crust forms along the mid-ocean ridge and old oceanic crust moves away.